. Which one of the following is not a prime number
A: 31
B: 61
C: 71
D: 91
Best Answer
Explanation:
A prime number is a number that is only divisible by itself or by 1 without leaving any remainder.
91can be divided by 7,13,91,1. From the definition of a prime number it is clear that 91 is not a prime number.
Final Answer:
Hence, Option D is correct.
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